CN108428927B - Power battery, power battery temperature control method and new energy vehicle - Google Patents
Power battery, power battery temperature control method and new energy vehicle Download PDFInfo
- Publication number
- CN108428927B CN108428927B CN201810205220.6A CN201810205220A CN108428927B CN 108428927 B CN108428927 B CN 108428927B CN 201810205220 A CN201810205220 A CN 201810205220A CN 108428927 B CN108428927 B CN 108428927B
- Authority
- CN
- China
- Prior art keywords
- heat conducting
- flexible heat
- power battery
- battery
- temperature
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/61—Types of temperature control
- H01M10/613—Cooling or keeping cold
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
- H01M10/486—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte for measuring temperature
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/61—Types of temperature control
- H01M10/615—Heating or keeping warm
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/62—Heating or cooling; Temperature control specially adapted for specific applications
- H01M10/625—Vehicles
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/65—Means for temperature control structurally associated with the cells
- H01M10/655—Solid structures for heat exchange or heat conduction
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Secondary Cells (AREA)
Abstract
The invention discloses a power battery, a power battery temperature control method and a new energy vehicle. The temperature control device is used for solving the problem that the temperature control of the conventional power battery is not good. The power battery comprises a shell, an electric core, flexible heat conducting strips and a finger plate tool, wherein the flexible heat conducting strips arranged in pairs are filled in a gap I between the electric core and a gap II between the electric core and the inner wall of the shell of the battery, and the finger plate tool is inserted into a gap between the flexible heat conducting strips to enable the flexible heat conducting strips and the battery shell to be in surface contact; the flexible heat conducting strip comprises a flexible heat conducting material, a copper pipe, an electric heating wire and a temperature sensor, wherein two ends of the flexible heat conducting strip respectively extend to the outer side of the battery shell and are connected with a heat conducting liquid circulating system and an electric control system. The power battery with the structure has excellent temperature control effect, can realize multiple effects of heat preservation, temperature rise and temperature reduction of the battery cell, enables the battery cell to be always in the best working temperature range, and can control the temperature difference between the battery cells in the battery pack within +/-3 ℃.
Description
Technical Field
The invention relates to the technical field of power batteries which are one of new energy automobile core technologies.
Background
The power battery is used as the power energy of the new energy automobile, and the quality of the temperature control system directly influences the endurance mileage of the automobile. Taking 18650 cylinder lithium cell electric cores as an example, each electric automobile car is integrated with thousands of electric cores, and in the charge-discharge process at every turn, the inside of electric core can produce a large amount of heats along with charging and discharging, leads to the sharp increase of battery temperature, and temperature control system is the control electric core and makes its important means that is in normal work of settlement temperature within range, so, temperature control system has played crucial effect.
The current power battery mainly has two heat dissipation modes: air-cooled heat dissipation and water-cooled heat dissipation, wherein the water-cooled heat dissipation is not pure water but a heat conducting liquid (Tesla uses a mixture of water and ethylene glycol) with freeze prevention and vaporization prevention. In the two heat dissipation modes, the water-cooling heat dissipation temperature control effect is far better than the air-cooling heat dissipation effect, and the water-cooling heat dissipation has higher requirements on sealing performance and assembling performance.
The thermal design of power cells has risen to a special discipline for solving and balancing the problem of heat accumulation of thousands of cells in power cells.
Different from other heat dissipation machines, in the thermal design of a power battery, the temperature difference and balance between each battery cell are often required to be considered, the effectiveness of the battery cells under the conditions of extreme cold and extreme heat is considered, and the self-expansion space and the buffer space between the battery cells are considered, so that in the design of the power battery, how to select a heat transfer medium and a heat transfer route is required to be considered, and not only is the heat transfer capacity of the power battery considered, but also the process, the maintenance operability, the excellent cost performance, the assembly performance and the like in the production are also considered.
Take high-end electric automobile-tesla electric automobile as an example, its aluminum pipe heat dissipation mode that uses, its principle is, through inserting the flat mouthful aluminum pipe between electric core, heat that the lithium cell produced is exchanged, is transported through the heat conduction liquid that flows in the flat mouthful aluminum pipe, realizes the control by temperature change, flat mouthful aluminum pipe is a bit high in strength, the shortcoming is, the flexibility that the high in strength of flat mouthful aluminum pipe brought is low, can not carry out the face contact with cylinder lithium cell, but the line contact advances, this kind of contact mode makes the heat exchange effect between flat mouthful aluminum pipe and the electric core surface relatively poor.
However, temperature control is not only simple temperature reduction, but also needs to keep the cell temperature within a reasonable temperature range, that is, how to achieve temperature uniformity among the cells in the battery pack in most cases, because the heat consumption rate (the heat consumed for generating 1kW · h of electric energy) of the battery at different temperatures is different, if the cells operate in an internal environment with insufficient heat transfer, such as adiabatic or high temperature, the cell temperature will rise significantly, which results in "hot spots" in the center of the battery pack, and once the cell uniformity is in problem, the cell uniformity will have a great influence on the service life of the whole battery pack, which may finally result in thermal runaway.
Disclosure of Invention
In order to solve the defects of the prior art, the invention provides a power battery and a new energy vehicle, which are used for solving the problems that the temperature control effect of the power battery is poor and how to keep the temperature consistency of a battery core in a working state, and the new energy vehicle using the power battery.
The technical scheme adopted by the invention for solving the technical problems is as follows:
the power battery comprises a shell, an electric core, flexible heat conducting strips and a fingerboard tool, wherein the electric core is arranged in a matrix in the warp and weft directions, and the power battery is characterized in that the flexible heat conducting strips arranged in pairs are filled in a gap I between the electric core and a gap II between the electric core and the inner wall of the shell of the battery, two continuous strip-shaped flexible heat conducting strips are oppositely arranged, and the fingerboard tool is inserted into a gap between the flexible heat conducting strips arranged in pairs, so that the flexible heat conducting strips are in surface contact with the adjacent electric core;
the flexible heat conduction strip comprises a flexible heat conduction material, a copper pipe, an electric heating wire and a temperature sensor, wherein the copper pipe, the electric heating wire and the temperature sensor are integrated in the flexible heat conduction material, and the direction of the copper pipe is consistent with the length direction of the flexible heat conduction strip;
and two ends of the flexible heat conducting strip respectively extend to the outer side of the battery shell.
The copper pipe is 0.1 mm thick
Copper tubing or flat copper tubing.
The thickness of the flexible heat conduction strip is between 3 mm and 5mm, and the flexible heat conduction strip has compressibility and height equivalent to the height of the battery core.
The flexible heat conduction material is heat conduction and insulation elastic rubber.
The shell of the power battery pack is made of inorganic foaming materials with heat preservation and heat insulation effects.
The novel energy vehicle is provided with a power electricity and power battery cooling system, the power battery cooling system comprises a control module, a heat exchanger, a circulating pump, an air conditioner condenser and a cockpit air cooler, and the novel energy vehicle is characterized in that a power battery comprises a shell, an electric core, flexible heat conducting strips and finger plate tools, wherein the electric core is arranged in a warp direction matrix and a weft direction matrix;
the flexible heat conduction strip comprises a flexible heat conduction material, a copper pipe, an electric heating wire and a temperature sensor, wherein the copper pipe, the electric heating wire and the temperature sensor are integrated in the flexible heat conduction material, and the direction of the copper pipe is consistent with the length direction of the flexible heat conduction strip;
the heating wire is electrically connected with the control module and used for heating the power battery;
the temperature sensor is electrically connected with the control module and is used for monitoring the internal temperature of the power battery;
the copper pipes are connected with a circulating pump after being collected through the bundle pipes, the circulating pump is respectively connected with a heat exchanger and a battery radiator through a three-way pipe and forms a heat exchange loop and an air cooling loop, and the heat exchanger is connected with an air conditioner condenser and an air cooler of a cockpit of the electric automobile.
The lower end of each fingerboard in the fingerboard tool is inserted to be flat.
The shell of the power battery pack is made of a foaming material with heat preservation and heat insulation effects.
According to the temperature control method of the power battery, the power battery system comprises the following structures: the electric vehicle air-conditioning system comprises a control module, a temperature sensor, a power battery pack, a heat exchanger, heating wires, a circulating pump I, a circulating pump II, a battery radiator, an air-conditioning condenser and a cockpit air cooler, wherein the electric core is arranged in a warp and weft direction matrix, a copper pipe, the heating wires and the temperature sensor are embedded in a gap I between the electric core and a gap II between the electric core and the inner wall of a battery shell, the heat exchanger is connected with the heat exchanger and the battery radiator through a three-way pipe, the heat exchanger is connected with the air-conditioning condenser or the cockpit air cooler of the electric vehicle through a copper pipe, the heating wires are electrically connected with the control module and used for heating the power battery pack; the temperature sensor is electrically connected with the control module and used for monitoring the internal temperature of the power battery pack; the method is characterized by comprising the following steps:
A. when the internal temperature of the power battery is higher than the set temperature interval: the circulating pump I works circularly, and the electric core is cooled by heat-conducting liquid flowing in the copper pipe; and is
When the external temperature is not higher than 30 ℃, the temperature is reduced by a battery radiator or a cockpit air cooler of the electric automobile;
when the outside temperature is higher than 30 ℃, the circulating pump II is started and radiates heat by an air conditioner condenser or an air cooler in the cockpit of the electric automobile;
B. when the internal temperature of the power battery is lower than a set temperature interval: circulating pump I is out of work, and the heat-conducting liquid in the copper pipe is in quiescent condition, and simultaneously, the heating wire circular telegram generates heat through the heating wire and for power battery package inside intensifies, and after the inside temperature of battery package rose to the predetermined temperature, the heating wire stopped heating.
The invention has the beneficial effects that:
1. the power battery with the structure has an excellent temperature control effect, and particularly can realize multiple effects of heat preservation, temperature rise and temperature reduction of the battery cell, so that the battery cell is always in the optimal working temperature range, and particularly the temperature difference among the battery cells in the battery pack can be controlled within +/-3 ℃.
2. The flexible heat conducting strip has the performances of flexibility, buffering and shock absorption, can protect electric cores between adjacent batteries in the battery pack, and has better shock resistance by matching with a foaming shell.
3. The isolation of the fingerplates enables the cells to be kept at a reasonable distance, and particularly, extrusion of the cells between adjacent cells is prevented. And arc surface contact is formed between the battery cell and the flexible heat conducting strip, so that the contact area is increased, and the heat exchange efficiency can be improved.
4. The presence of the finger plate causes the flexible heat conducting strip to form a local pressure at the contact surface of the cell, which can improve the heat exchange efficiency between the two. The flexible heat conducting strip has low cost and is convenient to popularize and utilize in the electric automobile industry.
5. The temperature control controllability is good, and after a reasonable monitoring temperature is set by one key, the temperature control system can automatically monitor and operate and is kept in a reasonable temperature range.
6. The flexible heat conducting strip material is composed of a flame-retardant flexible heat conducting material and a non-combustible copper pipe material, and has excellent performances of good wear resistance, electrical insulation, high compression capacity, good corrosion resistance, heat conducting performance and the like, and meanwhile, the problems of relevant application of shock absorption, insulation, puncture prevention, assembly tolerance compensation and the like of the battery cell can be solved.
Drawings
Fig. 1 is a schematic view of the inside of a battery pack.
Fig. 2 is a partially enlarged view of a portion a in fig. 1.
Fig. 3 is a diagram showing the assembled relationship of the flexible heat conducting strip and the fingerboard.
Fig. 4 is a schematic diagram of the installation of the battery core and the casing.
FIG. 5 is a schematic diagram of a temperature control system.
Fig. 6 is a second schematic diagram of a temperature control system.
Fig. 7 is a cross-sectional view of a flexible thermal strip.
Fig. 8 is an assembly relationship between a heat-conducting metal tube and a battery cell in the prior art.
In the figure: a cell number of 00 cells,
10 a metal heat-conducting material in the form of a metal,
20 flexible heat conducting strips, 21 flexible heat conducting materials, 22 copper tubes, 23 electric heating wires,
30 finger plate tool, 31 finger plate, 32 flat,
40 of a shell.
Detailed Description
18650A lithium ion battery (hereinafter referred to as a cell) is a standard lithium ion battery model number, where 18 denotes a diameter of 18mm, 65 denotes a length of 65mm, and 0 denotes a cylindrical battery. The 18650 common batteries are classified into lithium ion batteries and lithium iron phosphate batteries. The voltage of the lithium ion battery is 3.6V and 4.2V, the voltage of the lithium iron phosphate battery is 3.2V, the capacity is usually 1200mAh-3000mAh, and the common capacity is 2200mAh-3600 mAh.
This embodiment is implemented based on this cell 00 as a model.
In the handbook of the prior art, a metal material is used as a material having a good heat conductivity, and therefore, the metal material is often used as a heat conductive material, and is represented by a copper pipe, an aluminum pipe, and a stainless steel pipe.
In the thermal design of the power battery, the use of an electrically conductive metal heat conducting material should be avoided, and the metal heat conducting material is easy to cause short circuit of a battery cell during the use process. Even if metal is used for heat conduction, it needs to be insulated. According to the prior art, even after the insulation treatment, a good temperature equalization effect and a good temperature control effect are still not generated. Referring to fig. 8, the metal heat conducting material 10 with the insulating layer is clamped in the space between two rows of battery cores, because the metal heat conducting material 10 (usually in a tubular shape) is rigid, the flexibility is poor, so that the folding and other phenomena are difficult to complete, therefore, the line contact L is formed between the metal heat conducting material 10 and the battery core 00, that is, the arc surface contact is not formed between the metal heat conducting material 10 and the battery core 00, the problem of small contact area is that the heat conduction effect is poor, that is, the heat transfer between the battery core and the metal heat conducting material cannot be timely and effectively completed, and the temperature control effect is improved. This technology is currently used in power batteries for tesla electric vehicles.
The present invention solves the above problems with a combination of a flexible heat conductive material 21 and a copper tube 22.
The noun explains: the flexible heat conduction material is mainly silicon rubber and foaming rubber which are used at present, wherein the silicon rubber has the characteristics of good elasticity, and the foaming rubber has the characteristics of large deformation range, good heat conduction effect and higher pressure-resistant grade.
The forming process scheme 1 of the flexible heat conduction material and the copper pipe adopts integrated forming manufacturing, the flexible heat conduction material and the copper pipe are integrally extruded and formed, the thickness of the formed flexible heat conduction strip 20 is about 3 mm to 5mm, the flexible heat conduction strip has compressibility, the height is equivalent to the height of a battery core, and the flexible heat conduction strip has enough coating area. The thin copper pipe is embedded inside, the copper pipe trend is consistent with the trend of the flexible heat conducting strip, and the structural design facilitates large-scale extrusion molding, especially die extrusion molding. The section of the flexible heat conducting strip is designed to be rectangular, and the thin copper pipe is buried along the length direction.
The use method of the flexible heat conducting strip in the power battery comprises the following steps: two continuous strip-shaped flexible heat conducting strips 20 are prepared, the two flexible heat conducting strips are oppositely arranged, refer to fig. 3, and are inserted into a gap i between the battery cell and the lithium battery cell or a gap ii between the battery cell and the inner wall of the battery frame shell from one side, generally, the two gaps are transversely arranged or longitudinally arranged, that is, referring to fig. 3, the continuous flexible heat conducting strips are arranged inside the power battery shell in a U-shaped circuitous manner along the rows of the battery cells. Then, in the present embodiment, the arrangement of the plurality of U-shapes forms an S-shaped arrangement of three rounds, and then, both ends of the flexible heat conductive strip extend to the outside of the battery frame case, respectively. The electric cores are arranged in a matrix in the longitude and latitude directions, and a rhombic columnar space is formed between every two adjacent electric cores, namely, the flexible heat conducting strip is not clamped and is in a loose state in the space between every two adjacent electric cores. At this cylindrical space, the two flexible heat conducting strips are fitted by inserting the finger plate tool 30 between them, and in order to prevent the flexible heat conducting strips from being punctured, the lower end insertion end of each finger plate 31 is designed to be a non-sharp flat 32. The fingerboard is made of a flame-retardant or non-combustible bakelite material and can be of a hollow structure. Or an aluminum pipe with a diamond-shaped section can be adopted for replacement, and a light material is mainly used.
By the above manner, the flexible heat conduction strip 20 and the battery core 00 are in full and close contact. The flexible heat conducting strip is in large-area contact with the battery cell, so that rapid and complete heat exchange between the flexible heat conducting strip and the battery cell is facilitated.
After the completion, the copper pipes 22 at the two ends of the flexible heat conducting strip are converged by using the bundling pipe, and then are connected to the heat conducting liquid circulating system, and the temperature on the surface of the battery cell is adjusted by utilizing the circulation of the heat conducting liquid.
In this embodiment, the battery cells 00 in the battery pack are arranged in groups to achieve the best temperature control effect.
When in use, the best use mode is as follows: two flexibility heat conduction strips 20 are connected heat conduction liquid circulation supply end from opposite direction respectively, that is to say, the heat conduction liquid circulation direction in two flexibility heat conduction strips is opposite, like this, can guarantee that the temperature of the heat conduction liquid in the flexibility heat conduction strip is unanimous basically, guarantees that the inside heat conduction liquid of each group battery package is in unanimous temperature basically, and the circulating pressure of the circulating pump of the heat conduction liquid of deuterogamying for the temperature on each electric core monomer surface is within 3 degrees in the group battery.
As another molding scheme 2, the battery pack is manufactured by integrated molding, the flexible heat conducting material 21, the heating wire 23 and the copper tube 22 are integrally extruded and molded, the thickness of the molded flexible heat conducting strip 20 is about 3 mm to 5mm, the flexible heat conducting strip has compressibility and is equivalent to the height of an electric core, the heating wire and the thin copper tube are embedded inside, the directions of the heating wire and the copper tube are consistent with the direction of the flexible heat conducting strip, a composite structure of the copper tube, the heating wire and the flexible heat conducting material is formed, when the battery pack is used, the heating wire 23 is inserted into a standby power supply system, and the interior of the battery pack can be heated through a temperature control system after. The function is usually used in extremely cold regions, and the problems of low internal temperature and charging and discharging of the power battery in the extremely cold regions are solved.
In a further scheme, a temperature sensor is integrated in the flexible heat conduction material and used for monitoring the ambient temperature inside the power battery in real time. Of course, the temperature sensor may also be attached to the surface of the battery cell.
In fig. 5, a power battery temperature control system includes the following structure: the device comprises a control module, a temperature sensor, a power battery, a heat exchanger, an auxiliary electric heating element (generally an electric heating wire), a circulating pump (comprising a pump I and a pump II), a battery radiator, an air-conditioning condenser and a cockpit air cooler. Wherein, the power battery package is integrated with foretell flexibility heat conduction strip, has inlayed copper pipe, heating wire and temperature sensor in the flexible heat conduction strip 20, has higher integrated level, the installation of the flexibility heat conduction strip of being convenient for, and wherein the heating wire is a common supplementary electric heating element. The copper pipe is connected with the pump I through the cluster pipe, the circulating pump I is respectively connected with the heat exchanger and the battery radiator through the three-way pipe to respectively form a heat exchange loop and an air cooling loop, and the battery radiator adopts air cooling for heat dissipation. The heat exchanger is connected with an air conditioner condenser and a cockpit air cooler of the electric automobile through a pipeline, and cooling is provided for the heat exchanger through the air conditioner condenser and the cockpit air cooler. The sensor is arranged inside the power battery, particularly the position between the battery cell gaps or the surface of the battery cell is attached to the sensor, and the sensor is used for collecting the temperature inside the battery pack and feeding back the temperature to the circulating pump. The circulating pump adopts a variable frequency pump.
The query 18650 lithium cell use specification shows that: the working temperature of the lithium battery cell monomer is as follows: the temperature is minus 20 ℃ to plus 50 ℃, the optimal working temperature is plus 20 ℃ to plus 40 ℃, therefore, the monitoring temperature of the system is set to 30 plus or minus 3 ℃,
when the internal temperature of the power battery is higher than the set temperature interval: the circulating pump I works circularly, and the electric core 00 is cooled through heat conducting liquid flowing in the copper pipe; and stopping the operation of the circulating pump I until the temperature is reduced to a set temperature interval. When the external temperature (generally referred to as air temperature) is not higher than 30 ℃ in spring and autumn and the like, the electric automobile is cooled by a battery radiator or a cockpit air cooler, when the external temperature is higher than 30 ℃ in summer and the like, the circulating pump II is synchronously started to work, and the electric automobile is cooled by an air conditioner condenser or a cockpit air cooler, so that the air conditioner condenser has the most obvious strong cooling effect and consumes the most electric energy in three cooling effects, and is started only in extreme hot weather to save the electric energy.
When the internal temperature of the power battery is lower than a set temperature interval: circulating pump I is out of work, that is to say, the heat-conducting liquid in the copper pipe is in quiescent condition, and macroscopically, the inside temperature of battery package is in the heat preservation state, and simultaneously, 23 switch switches on of heating wire, generate heat through heating wire 23, for power battery package inside intensifies, after the inside temperature of battery package rises to the predetermined temperature, the heating wire stop heating, the problem that the inside temperature of battery package was crossed excessively in the vehicle start-up process in high and cold district is solved. In the technology of the invention, the heating wires are uniformly arranged in the flexible heat conduction material, so that the advantages of rapid heating and good uniformity are achieved, and generally, the temperature in the battery pack can be heated to the optimal working range within 1 to 2 minutes in an environment of-30 ℃.
The temperature control is carried out by using the heat conducting liquid technology, the shell can be made into a structure with heat preservation and heat insulation effects, the material is made of porous materials with buffering and heat insulation effects, for example, modified polyurethane foam materials or modified polystyrene foam materials, and compared with a traditional metal shell, the foam materials have the characteristic of light weight and are more combined with the design requirement of light weight of an electric automobile.
When the internal temperature of the power battery falls into a set stable interval: the electric heating wire stops working, and heat preservation is realized through the closed environment in the battery pack and the porous characteristic of the flexible heat conducting strip and the shell with the heat insulation effect. Under the general condition, along with the car one section distance or time of traveling, electric core self can the heat dissipation heat and the accumulation, realizes the intensification of electric core, this moment to according to the condition of generating heat of electric core (obtaining data by the sensor control), I intelligence of circulating pump is opened, realizes the regulation and control of battery package internal temperature.
Fig. 6 differs from fig. 5 in that in fig. 6, the flow directions of the heat transfer liquid in the flexible heat transfer strips between adjacent flexible heat transfer strips are the same, and in fig. 5, the flow directions of the heat transfer liquid in the flexible heat transfer strips between adjacent flexible heat transfer strips are opposite.
The application of the flexible heat conduction strip 20 can fully and reasonably utilize the gap inside the battery pack, does not occupy the effective space inside the battery pack basically, can improve the high integration and energy density of the power battery, and provides an ultra-small and ultra-thin battery pack. Meanwhile, the flexible heat conducting strip can form various effects of buffering, heat preservation, heat conduction and the like among the battery cells, the safety of the battery cells is facilitated, and the flexible heat conducting strip has the characteristics of flame retardancy and insulation, so that the reliability of the power battery is improved.
The advantages are that: the flexible heat conducting strip 20 used in the invention has thicker thickness, is filled in a gap between two rows of electric cores, can deform by matching with the finger plate 30, and in the deformation process, an internal copper pipe is synchronously bent and deformed to fill the gap and increase the contact surface with the electric core, and the increased area is more than ten times of the original structure, so that the heating part on the surface of the electric core is fully contacted with the flexible heat conducting strip, the flexible heat conducting strip can be transferred to the internal copper pipe 22 again after absorbing heat, and then the heat is transferred out by the heat conducting liquid in the copper pipe, if the circulating pump I is not opened, and the power battery pack shell made of porous materials is matched, so that good heat preservation can be realized. Because the flexible heat conducting strip is internally provided with a plurality of micropores, the heat storage and preservation capacity is several times stronger than that of the air. Meanwhile, the flexible heat conducting strip with the porous structure can also play roles in shock absorption, insulation, sealing and the like, and is filled between the electric cores to form a sufficient buffering role.
The flexible heat conduction strip meets the design requirements of miniaturization, ultra-thinning and high integration of the power battery.
Flexible thermally conductive strip technology used in the present invention includes, but is not limited to, the following thermally conductive materials:
the A-grade flexible heat conduction material comprises the following components in parts by weight:
vinyl silicone oil 100 parts
Hydrogen-containing silicone oil (cross-linking agent) 10 parts
0.1 portion of hydrogen platinic acid (catalyst)
300 portions of aluminum nitride (heat conduction material)
10 parts of silicone resin
50 parts of stone powder
The flexible heat conduction material can also adopt the prior art, such as heat conduction insulating elastic rubber, the heat conduction insulating elastic rubber adopts a silicon rubber base material, and ceramic particles such as boron nitride, aluminum oxide and the like are used as fillers, so that the heat conduction effect is very good. The thermal impedance is lower than other heat conducting materials under the same condition.
The preparation process of the A-level flexible heat conduction material comprises the following steps:
(1) mixing and curing, adding the components into a vacuum stirrer at the temperature of 130 ℃ for fully mixing for later use.
(2) And extruding the mixture to a forming die by using an extruder, compounding the mixture, the copper pipe and the electric heating wire in the die according to a set direction to form a flexible heat conducting strip, and conveying the flexible heat conducting strip to an infrared oven for high-temperature drying and shaping.
In step 2, a temperature sensing patch can be selectively implanted as needed for sensing problems inside the flexible heat conducting material.
The utility model provides a samming shell 40 with antidetonation effect for replace current metal material's protective housing, this samming shell includes following technical essential:
the housing 40 is a metal sheet housing, for example, a 0.5 mm stainless steel sheet is integrally formed by stamping, an inorganic foam material is arranged inside the housing, the inorganic foam material is directly formed inside the housing by a mold, and the mold design is performed according to the arrangement requirement of the battery cell.
The inorganic foaming material has the incombustible A-grade fireproof characteristic, and can meet the use requirements of incombustibility, buffering and light weight of the power battery.
The above-described embodiments are merely illustrative of the preferred embodiments of the present invention and do not limit the scope of the present invention, and various modifications and improvements of the present invention may be made by those skilled in the art without departing from the spirit of the present invention as defined by the appended claims.
Claims (9)
1. The power battery comprises a shell, an electric core, flexible heat conducting strips and finger plate tools, wherein the electric core is arranged in a matrix in the warp and weft directions, and the power battery is characterized in that the flexible heat conducting strips arranged in pairs are filled in a gap I between the electric core and a gap II between the electric core and the inner wall of the battery shell, the finger plate tools are inserted into gaps between the flexible heat conducting strips arranged in pairs, and the finger plate tools are spread and enable the flexible heat conducting strips to form surface contact with adjacent electric cores;
the flexible heat conducting strip comprises a flexible heat conducting material, a copper pipe, a heating wire and a temperature sensor, wherein the copper pipe, the heating wire and the temperature sensor are integrated in the flexible heat conducting material, and the direction of the copper pipe is consistent with the length direction of the flexible heat conducting strip;
and two ends of the flexible heat conducting strip extend to the outer side of the battery shell respectively.
2. The power battery of claim 1, wherein the flexible heat conducting strip has a thickness of between 3 mm and 5mm, and is compressible to a height comparable to the height of the cell.
3. The power battery of claim 1, wherein the flexible heat conductive material is silicone rubber and foamed rubber.
4. The power cell of claim 1, wherein the housing is an inorganic foam.
5. The novel energy vehicle is provided with a power battery and a power battery cooling system, the power battery cooling system comprises a control module, a heat exchanger, a circulating pump, an air conditioner condenser and a cockpit air cooler, and the novel energy vehicle is characterized in that the power battery comprises a shell, an electric core, flexible heat conducting strips and finger plate tools, the electric core is arranged in a warp direction matrix and a weft direction matrix, the flexible heat conducting strips which are arranged in pairs are filled in a gap I between the electric core and a gap II between the electric core and the inner wall of the battery shell, and the finger plate tools are inserted into the gaps between the flexible heat conducting strips which are arranged in pairs, so that the flexible heat conducting strips are in surface contact with adjacent electric cores;
the flexible heat conducting strip comprises a flexible heat conducting material, a copper pipe, a heating wire and a temperature sensor, wherein the copper pipe, the heating wire and the temperature sensor are integrated in the flexible heat conducting material, and the direction of the copper pipe is consistent with the length direction of the flexible heat conducting strip;
the heating wire is electrically connected with the control module and used for heating the power battery;
the temperature sensor is electrically connected with the control module and is used for monitoring the internal temperature of the power battery;
the copper pipes are connected with a circulating pump after being collected through the bundle pipes, the circulating pump is respectively connected with a heat exchanger and a battery radiator through a three-way pipe and forms a heat exchange loop and an air cooling loop, and the heat exchanger is connected with an air conditioner condenser and an air cooler of a cockpit of the electric automobile.
6. The new energy vehicle of claim 5, wherein the lower insertion end of each fingerboard in the fingerboard tool is flat.
7. The new energy vehicle of claim 5, wherein the outer shell is a foam material.
8. The power battery temperature control method and the power battery temperature control system comprise: the electric vehicle air-conditioning condenser comprises a control module, a temperature sensor, a power battery, a heat exchanger, an electric heating wire, a circulating pump I, a circulating pump II, a battery radiator, an air-conditioning condenser and a cockpit air cooler, wherein the power battery comprises an electric core and flexible heat conducting strips, the electric core is arranged in a warp and weft direction matrix, the flexible heat conducting strips which are arranged in pairs are filled in a gap I between the electric core and a gap II between the electric core and the inner wall of a battery shell, a copper pipe, the electric heating wire and the temperature sensor are embedded in the flexible heat conducting strips, the copper pipe is connected with the circulating pump I through a bundling pipe, the circulating pump I is respectively connected with the heat exchanger and the battery radiator through a three-way pipe, the heat exchanger is connected with the air-conditioning condenser and the cockpit air cooler of the electric; the temperature sensor is electrically connected with the control module and is used for monitoring the internal temperature of the power battery; the method is characterized by comprising the following steps:
A. when the internal temperature of the power battery is higher than the set monitoring temperature: the circulating pump I works circularly, and the electric core is cooled by heat-conducting liquid flowing in the copper pipe; and is
When the external temperature is not higher than 30 ℃, the temperature is reduced by a battery radiator or a cockpit air cooler of the electric automobile;
when the outside temperature is higher than 30 ℃, the circulating pump II is started and radiates heat by an air conditioner condenser or an air cooler in the cockpit of the electric automobile;
B. when the internal temperature of the power battery is lower than the set monitoring temperature: circulating pump I is out of work, and the heat-conducting liquid in the copper pipe is in quiescent condition, and simultaneously, the heating wire circular telegram generates heat through the heating wire and for power battery package inside intensifies, and after the inside temperature of battery package rose to the predetermined temperature, the heating wire stopped heating.
9. The power battery temperature control method according to claim 8, wherein the monitored temperature is set to 30 ± 3 degrees celsius.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810205220.6A CN108428927B (en) | 2018-03-13 | 2018-03-13 | Power battery, power battery temperature control method and new energy vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810205220.6A CN108428927B (en) | 2018-03-13 | 2018-03-13 | Power battery, power battery temperature control method and new energy vehicle |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108428927A CN108428927A (en) | 2018-08-21 |
| CN108428927B true CN108428927B (en) | 2020-10-02 |
Family
ID=63157938
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810205220.6A Active CN108428927B (en) | 2018-03-13 | 2018-03-13 | Power battery, power battery temperature control method and new energy vehicle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108428927B (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11322804B2 (en) | 2018-12-27 | 2022-05-03 | Sion Power Corporation | Isolatable electrodes and associated articles and methods |
| US11637353B2 (en) * | 2018-12-27 | 2023-04-25 | Sion Power Corporation | Electrodes, heaters, sensors, and associated articles and methods |
| JP2022516102A (en) * | 2018-12-27 | 2022-02-24 | シオン・パワー・コーポレーション | Electrochemical devices and related articles, components, configurations and methods |
| CN110085946A (en) * | 2019-05-30 | 2019-08-02 | 杭州千辙科技有限公司 | A kind of the integrated temperature control device and its control method of power cell of vehicle |
| CN112952250B (en) * | 2021-01-27 | 2022-07-15 | 龙口市动力油管有限公司 | Heat exchange module and system for battery, energy battery and new energy automobile |
| CN113624043B (en) * | 2021-08-06 | 2022-08-12 | 合肥工业大学 | Temperature-equalizing distributed parallel micro-flow-channel heat exchanger and application thereof |
| CN216354437U (en) * | 2021-10-29 | 2022-04-19 | 宁德时代新能源科技股份有限公司 | Heating device, battery and electric device |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000285887A (en) * | 1999-03-31 | 2000-10-13 | Matsushita Electric Ind Co Ltd | Battery pack and manufacture thereof |
| JP2002184374A (en) * | 2000-12-12 | 2002-06-28 | Honda Motor Co Ltd | Cell pack |
| CN205039219U (en) * | 2015-10-15 | 2016-02-17 | 广州橙行智动汽车科技有限公司 | Battery liquid cooling structure |
| CN107039710A (en) * | 2015-12-30 | 2017-08-11 | 昶洧新能源汽车发展有限公司 | The battery coolant circuit pad of electric vehicle |
| CN107403892A (en) * | 2017-08-03 | 2017-11-28 | 苏州安靠电源有限公司 | Heat-conductive assembly, the high capacity cell and its manufacture method for configuring the heat-conductive assembly |
-
2018
- 2018-03-13 CN CN201810205220.6A patent/CN108428927B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000285887A (en) * | 1999-03-31 | 2000-10-13 | Matsushita Electric Ind Co Ltd | Battery pack and manufacture thereof |
| JP2002184374A (en) * | 2000-12-12 | 2002-06-28 | Honda Motor Co Ltd | Cell pack |
| CN205039219U (en) * | 2015-10-15 | 2016-02-17 | 广州橙行智动汽车科技有限公司 | Battery liquid cooling structure |
| CN107039710A (en) * | 2015-12-30 | 2017-08-11 | 昶洧新能源汽车发展有限公司 | The battery coolant circuit pad of electric vehicle |
| CN107403892A (en) * | 2017-08-03 | 2017-11-28 | 苏州安靠电源有限公司 | Heat-conductive assembly, the high capacity cell and its manufacture method for configuring the heat-conductive assembly |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108428927A (en) | 2018-08-21 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108428927B (en) | Power battery, power battery temperature control method and new energy vehicle | |
| CN108511844B (en) | Application of flexible heat conduction strip in power battery heat dissipation system | |
| CN203398244U (en) | Thermal management component with opposite main surfaces for battery unit | |
| CN208157586U (en) | The radiator and battery modules of battery modules | |
| CN102376997B (en) | Battery system with temperature adjusting device | |
| CN113314783B (en) | Electric automobile battery temperature management system based on composite phase change material and liquid cooling are mixed | |
| CN207368172U (en) | A kind of battery pack thermal management system using phase-change material | |
| CN208336452U (en) | A kind of high-power lithium ion battery heat management system | |
| CN114094228A (en) | Power battery thermal management system based on phase-change material composite soaking plate | |
| CN216161818U (en) | Heat insulation sheet, battery module and battery pack | |
| CN111342075A (en) | Hydrogen fuel battery pack of fuel cell automobile and heat radiating device | |
| CN114583324B (en) | Direct cooling type battery pack thermal management device and thermal management system based on tab heat dissipation | |
| CN110556610A (en) | Liquid-cooled battery pack thermal management system based on flexible heat pipe and working method | |
| CN112952237A (en) | Battery heat management device, battery module and battery heat management method | |
| CN103367835A (en) | Power battery thermal management system based on loop heat pipes | |
| CN111355004B (en) | Battery module | |
| CN107994291A (en) | A kind of and matched soft pack cell module of high-efficiency thermal management system | |
| CN207602734U (en) | A kind of power battery thermal management system | |
| CN109119725A (en) | The power battery thermal management system of ultrathin aluminum strip heat pipe combination composite phase-change material | |
| CN210607542U (en) | Liquid-cooled battery pack thermal management system based on flexible heat pipe | |
| CN210296573U (en) | Power battery system and vehicle | |
| CN110112502A (en) | A kind of electric automobile power battery register, cooling system and electric car | |
| CN105895999A (en) | Heat transfer system of battery module, battery management system and electric vehicle | |
| CN212303771U (en) | Battery temperature control switch | |
| CN211605357U (en) | Battery module |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| TA01 | Transfer of patent application right | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20200904 Address after: 201800 Shanghai city Jiading District town of Jiading Bole Road No. 70 building 1209 room 10 Applicant after: Shanghai Howard Intelligent Technology Co.,Ltd. Address before: Ji'nan City Central Jiwei Road No. 106 of 250000 cities in Shandong Province Applicant before: Kong Ruiqing |
|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address | ||
| CP03 | Change of name, title or address |
Address after: Room 217, 2819 Laiyang Road, Pudong New Area, Shanghai, 200120 Patentee after: Matrix data technology (Shanghai) Co.,Ltd. Address before: 201800 1209, room 10, 70 Bole Road, Jiading Town, Jiading District, Shanghai. Patentee before: Shanghai Howard Intelligent Technology Co.,Ltd. |